Myśl Żydowska do Kapłańska 23:44

And concerning these matters it is said that in everything that Moses our teacher was commanded to say to the children of Israel regarding matters that are practiced for generations, he did not mention explicitly that these words were spoken by Moses to the children of Israel. Because when there was no immediate need, it was not necessary to inform them that what was spoken to Moses by the Lord was communicated to them. It is known that what was spoken to them, but in matters of commandments or instructions relevant to a specific moment, it is found that it is written that Moses spoke and communicated to them the words of the Lord and they fulfilled them, such as the work of the Tabernacle and its vessels, as seen in the seven days of inauguration and on the eighth day, and similar occasions. You will not find from the giving of the Torah until the Book of Leviticus that Moses spoke to the children of Israel what the Lord spoke to him, except in matters that were necessary at the time, such as the construction of the Tabernacle and its vessels. Similarly, in the Book of Leviticus, you will not find that Moses spoke to the children of Israel what he was commanded regarding matters practiced for generations, except in relation to the appointed times, as in the portion of Emor where it says, "And Moses declared to the appointed times of the Lord," and in the portion of Ish Mizeh ("This is the law of") for their generations, where it is written afterward, "And Moses spoke to Aaron and his sons." And these have reasons, as our sages have said and as the Ramban, may his memory be blessed, has written. In the book Bamidbar Sinai, at the end of the portion of the appointed times, in the concluding part of the portion of Pinchas, it says, "And Moses spoke to the children of Israel," and the Ramban, may his memory be blessed, has also given an explanation for this.